Critical severity · published May 11, 2026
CVE-2026-42858
Open edX Platform: Server-Side Request Forgery (SSRF) in SAML Provider Data Sync Endpoint
9.9
CVSS
0.4%
EPSS
No
On KEV
Description
Open edX Platform enables the authoring and delivery of online learning at any scale. The sync_provider_data endpoint in SAMLProviderDataViewSet allows authenticated Enterprise Admin users to supply an arbitrary URL via the metadata_url POST parameter. This URL is passed directly to requests.get() in fetch_metadata_xml() without any URL validation, IP filtering, or scheme enforcement. An attacker with Enterprise Admin privileges can force the server to make HTTP requests to internal network services, cloud metadata endpoints (e.g., AWS 169.254.169.254), or other attacker-controlled destinations. This vulnerability is fixed by commit 6fda1f120ff5a590d120ae1180185525f399c6d0 and 70a56246dd9c9df57c596e64bdd8a11b1d9da054.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openedx-platform · openedx
< 6fda1f120ff5a590d120ae1180185525f399c6d0 · source: vendor
OP
Openedx · Openedx
before 2026-04-24 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42858
Patch
https://github.com/openedx/openedx-platform/commit/6fda1f120ff5a590d120ae1180185525f399c6d0
Patch
https://github.com/openedx/openedx-platform/commit/70a56246dd9c9df57c596e64bdd8a11b1d9da054
Exploit
https://github.com/openedx/openedx-platform/security/advisories/GHSA-328g-7h4g-r2m9
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